A Dallas County grand jury Wednesday is expected to hear an aggravated assault case against the fired Balch Springs officer who shot and killed 15-year-old Jordan Edwards.

Roy Oliver was arrested on a murder charge in Jordan's April death. The aggravated assault case is unrelated and stems from a traffic accident two weeks before Jordan was killed.

Monique Arredondo previously told The Dallas Morning News that Oliver pointed a gun at her after she rear-ended his truck along South Cockrell Hill Road in Dallas in April. Oliver was off duty and not in uniform at the time.

Oliver was not arrested. The case was referred to the grand jury.

No shots have to be fired for a grand jury to indict someone for aggravated assault. If Oliver is indicted, it would likely become official Friday.

Oliver's attorney could not be reached for comment. The district attorney's office declined to comment.

"As soon as I put my gear into park, he was already out of his truck, and he was at my window," Arredondo, 26, told The News. "He pulled out his gun on me."

Arredondo said her 13-year-old sister was in the backseat crying.

A Dallas police spokeswoman said that when officers arrived at the scene, Oliver had his gun holstered on his hip and a police badge clipped to his belt. He told Dallas officers that he had his gun at the "low ready" position and had identified himself as an officer because he thought the other driver may have been reaching for a weapon or trying to flee. Dallas police determined that no offense had occurred.

Arredondo filed a complaint against Oliver.

Aggravated assault is punishable by up to 20 years in prison. Murder convictions can result in a life sentence.

Initially, Balch Springs Police Chief Jonathan Haber said Oliver fired his rifle into a car of teenagers because the car was backing up aggressively toward him and another officer. Haber, after viewing body camera video of the shooting, said the car was actually driving away at the time. Jordan, who was sitting in the front passenger seat, was struck in the head.